Field



(No Model.)

0. W. LITTLEF-IELD.

V SHUTTER OPERATOR.

Patented Aug. 3, 1886. I

MQ I W IE IS in an UNITED STATES PATENT 'OEEicE.

CHARLES V. LITTLEFIELD, OF AMESBURY, MASSACHUSETTS, ASSIGNOR OF THREE-FOURTHS TO FRANK P. TODD AND JAMES L. FOXVLER, BOTH OF SAME PLACE.

SHUTTER-OPERATOR.

Application filed September 14, 1885.

To all whom it 71mg concern:

Be it known that I, CHARLES W. LITTLE- FIELD, of Amesbury, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in \Vindow- Blind Attachments, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claim.

Figure 1 is a vertical section through the window-casings and the blind attachment, taken in the line of the actuating-spindle, which latter is shown in elevation. Fig. 2 is an inverted or under side plan view of the exterior devices shown in Fig. 1, and a portion of the actuating-spindle. Fig. 3 is a top plan View of the exterior devices shown in Figs. 1 and 2. Fig. 4: is a detached elevation of the interlocking plate shown at the left in Fig. 1, as with the actuating-knob removed, and showing the end of theactuating-spindle. Fig. 5-is a detached elevation of the actuatingknob, viewed as from the right in Fig. 1.

Referring to the drawings, A represents the interior casing of the window, and B the exterior casing thereof, while 0 represents the stile of the blind. An actuating-spindle, a, of the requisite length extends through said casings, and upon its outer end is secured the spur-pinion 1), arranged next to plate 0, secured to casing B, and which serves as the journal-bearing of the spindle. A segmental crown-gear, f, whoseteeth 71 are engaged by pinion b, is pivoted upon pin g,which is secured in horizontal arm (2 of plate 0, and in bracket 0, which is secured to said plate 0 by screws t, that enter casing B,said gear f being arranged between said arm and bracket, as shown.

Gear f is effectively secured to stile G by means of screws passing through ears '5 j k, formed integrally with the gear, and thence into the stile. The rotation of spindle a will, through the described gearing, swing the blind upon its pivot g, which, as described, serves also as the axis of gear f, which latter is the hinge of the blind.

For the purpose of actuating and locking SPECIFICATION forming part of Letters Patent No. 346,855, dated August 3, 1886.

Serial No. 176,996. (No model.)

spindle a, it is provided with a hand-knob, q, the sleeve 0001 which has a square hole, a,

"which fits to slide freely on the angular por- V tionp of the spindle. Said sleeve :0 fits to rotate freely in hole a in face-plate Z, the concentrically-arranged teeth at of which interlock with the corresponding teeth, 8, of the knob. For securing knob q to the spindle, a recess, y, to receive the head of screw 1; and coiled spring 10, is formed in' the outer portion of the knob, and said screw passes through the spring and diminished passage .2 of the knob, and is threaded in the axis of the spin dle, said spring by its expansive force tending to interlock teeth 8 of the knob with teeth in of plate Z, which, when so arranged, lock the blind in position. By drawing the knob outward till its teeth are disengaged from teeth at, it then serves as the means of actuating the blind through the spindle and gears.

The bracket 6 may be formed as an integral portion of plate 0; but for obvious economical reasons it is preferably formed separate therefrom, and the pinion and gear may, if desired, be formed with bevel-teeth, instead of those as shown.

I am well aware that it is not new to employ a spindle extending through the window casings from the interior to the exterior, and

arranged to actuate the blind by means ot" support said gear and the blind to which it' is secured, substantially as specified.

CHARLES \V. LITTLEFIELD.

YVi tnesses GEORGE H. BRIGGS,

FRANK P. TODD. 

